Improved street-scraper



J.`K.TH0MPS0N.

STREET SCRAPBR:

NO- 94,792- Patenvted Sept. 14, 1869- me noms naps ca.. mdrouwo.. wnsmna'au. n. c.

lluitml ,gister JAMES K. THOMPSON, OF CHICAGO,l ILLINOIS.

Laim Petn: No. 94,792, dac Sqnmber 14, 1869.

IMPRQYED STREET-SCRAPER The Schedule referred to in then Letten Patent and making part ofthe lame.

To all 'ze-hom it may concern Be it known that I, J AMES K. THoMrsox, of the city of Chicago, in the State of Illinois, have invented certain new and useful Improvements in Street-Scrapers; and I do hereby declare that the following is a full, clear, and exact description thereof, reference being-had to the accompanying drawings, making part of this specification, in which- Figure-l is a plan view of my scraper, attached to a ii'ame on wheels.

Figure 2, a front 'elevation of the same, detached.

Figures 3 and 4 are details.

The objects of my invention are to construct a street-scraper which will in use conform itself to the form of the road, and to 'inequalitiesin its surface; and to so connect thc same to a frame that it can be raised.

, To enable others skilled in the art to make and use my invention, I proceed to describe its construction and operation.

I 11 I2 I L, represent a frame supported on wheels W, upon an axle, J, to which frame the scraper is connected when used,

G is a caster-wheel, the pivotal point g being iu the centre oiLL. This wheel supports the rear-end of the frame, when the' scraper is raised from the ground, and renders it easy to turn around in a small'l space.

Aand B are two pieces of timber'. The former may be live inches wide and three inches thick; the latter', B, may be about live inches by eight. rI`hese I place about tive inches apart, keeping them in that position by means of a block, D, at each end. Y

These two pieces should be not less than nine feet long; and to these the other port-ions ot' the scaper are connected. l

The scraper-board I make in several parts or sections, indicated by theletters C. 'They may be about twelve inches wide and about two feet long, and of sufficient thickness to give requisite strength, and maybe nitide of' steel, or of wood and steel.

Two iron rods, c c, flattened or split at the lower end, are securely bolted to each section C.

These twov rods are to pass through holes in A and B, so located that the sections C will be at a slight angle 'with the timbers A B, as seen at dotted lines upon A, iig. l;V and these sections C are to be so arranged and placed that one will overlap the other somewhat, as seen at dotted lines, iig. 2, so that no dirt can pass between the several sections.

Between the two pieces A B, and encircling the rods a, I place spiral springs b and I prevent the sections from dropping too low by putting pins through the rods, eitherat the top oi' A or B.

Ii'eces, of rubber may be scoured tothe lower edge of each section, C, by means of a metallic strip and bolts, as shown by red lines at h, iig; 2, by the use of which the work'will be more thoroughly done, especially' on smooth pavements.

E E' are short pieces of wood, bolted between A and B, to which irons, c, are bolted, for thc purpose of connecting the scraperto the frame. This can conveniently be done by means of the iron d, passing,v through thcirons candconnected to the frame, as shown in tigfl f In use the scraper is so arranged, with reference to the frame, as to be in aline diagonal to the line ot' the road.

The rods aslipuld be about one and a quarter inch ink diameter; 'and should not lit tightly inthe holes in A and B, but should be loosetherein, and a pin must be placed through each rod, just beneath-the springs a, so that thc springs may operate as hereafter described. Y

. H is a lever, having its ful'erurn at 1', and connected to A at c, by meaus'of which the scraper can4 be elevated from the street when desired.

In use the scraper rests upon t-he lower edges of the sections C, andthe weight of A B will compress the spiings. a,'leavirig a space between the lower `end 1of, each spring and the timber' or piece B, the ten dency of the springs constantly being to force 'down'- the several' sections C, keeping them in close cont-act 'with the road:

Y, When the scraper stands upon or' passes over a. level street, each spring will equally'compressed; but if the scraper passes overany uneven places it.

will conform itself 'to the surface,.ard the springs u A will force down the several sections C into any depressions ovcr which they may pass, taking the dirt out therefrom, 'as well asfrom the level places. 0i' course the sections will not go down into holes or depressions which are shorter than the several sections.

It is customary to make pavements crowning, and 'a long rigid scraper will not touch, at all points, such pavernentswhile, upon such pavements, each section ot' my scraper will touch the pavement. I

Being placed diagonally'across the street, the dirt willall be carried to one end ot' the scraper, and he deposited in a continuous line.

In constructing my scraper, thc springs 11 `uiay be omitted, and a weight'lnay be placed upon the top of each rod a, to force the sections C down; or this may be accomplished by makingfthe sections suiiiciently heavy; butl regard the springs as the better method, their action being rapid,'and they do not add materially to the weight of the scraper.

My scraper may be connected to a frame on runners A 2. Gbnnectiug the scrapex-frame lousely to the caras weil as wheels. ryingframe by means of the rod l and eyes e, sub- Hnvng thus fully described my invention, stantinlly as shown. W hat I claim/:Ls new, and desire to secure by Let- JAMES K. THOMPSON. ters Patent, is as follows: 1

1. The scraper-board, when made in separately-ad- Withesses: jusigafble and independent sections O C, substantialy E. A. WEST, as '11nd for the purposes specified. L. L. BOND. 

